8004 External Harman Amplifier

8004 Harman External Amplifier

Rear loudspeaker channel faulty

Diagnostic conditions
- Ignition on
- PCM2/CDR23 on

NOTE: Fault code 8003 is recorded in the PCM2 MMI if the operating buttons are actuated for longer than 1 minute.

Possible cause of fault
- Short circuit to B+/ground in wiring harness
- Short circuit loudspeaker faulty
- Short circuit amplifier faulty

Affected pins
Harman external amplifier plug A, pin 24, pin 29, pin 25, pin 38.

Diagnosis/troubleshooting

Diagnosis/troubleshooting (Part 1):

Diagnosis/troubleshooting (Part 2):